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प्रश्न
Name the electrophile produced in the reaction of benzene with benzoyl chloride in the presence of anhydrous \[\ce{AlCl3}\]. Name the reaction also.
उत्तर
\[\begin{array}{cc}
\phantom{}\ce{O}\phantom{.......................}\ce{O}\phantom{...............................}\\
\phantom{}||\phantom{.......................}||\phantom{...............................}\\
\ce{C6HC - Cl + AlCl3 -> C6H5\overset{δ+}{C - Cl} = \overset{δ-}{Alcl3} -> C6H5Co+ + AlCl4}
\end{array}\]
Friedel–Crafts acylation reaction.
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संबंधित प्रश्न
Predict the product of the following reaction:
Aldehydes are produced on reduction of the following by DIBAL-H:
The oxidation of toluene to benzoic acid can be done using which of the following reagents.
Ethylbenzene is generally prepared by acetylation of benzene followed by reduction and not by direct alkylation. Think of a possible reason.
Can Gatterman-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss.
Match the example given in Column I with the name of the reaction in Column II.
| Column I (Example) |
Column II (Reaction) |
||
| (i) | \[\begin{array}{cc} \phantom{...}\ce{O}\phantom{..............................}\ce{O}\phantom{}\\ \phantom{...}||\phantom{..............................}||\phantom{}\\ \ce{CH3 - C - Cl + H2 ->[Pd - C/BasO4] CH3 - C - H} \end{array}\] |
(a) | Friedel Crafts acylation |
| (ii) |  |
(b) | HVZ reaction |
| (iii) |  |
(c) | Aldol condensation |
| (iv) | \[\begin{array}{cc} \ce{R - CH2 - COOH ->[Br/Red P] R - CH - COOH}\\ \phantom{.....................}|\\ \phantom{.......................}\ce{Br} \end{array}\] |
(d) | Cannizaro’s reaction |
| (v) | \[\ce{CH3 - CN ->[(i) SnCl2/HCl][(ii) H2O/H+] CH3CHO}\] | (e) | Rosenmund’s reductio |
| (vi) | \[\ce{2CH3CHO ->[NaOH] CH3 - CH = CHCHO}\] | (f) | Stephen’s reaction |
An aromatic compound ‘A’ (Molecular formula \[\ce{C8H8O}\]) gives positive 2, 4-DNP test. It gives a yellow precipitate of compound ‘B’ on treatment with iodine and sodium hydroxide solution. Compound ‘A’ does not give Tollen’s or Fehling’s test. On drastic oxidation with potassium permanganate it forms a carboxylic acid ‘C’ (Molecular formula \[\ce{C7H6O2}\]), which is also formed along with the yellow compound in the above reaction. Identify A, B and C and write all the reactions involved.
What is the name of the given reaction of preparation of aldehyde?
\[\ce{C3COCl ->[H2][Pd/BaSO4] CH3CHO + HCl}\]
When 2 – hydroxyl benzoic acid distilled with zinc dust, it give
Explain the following reactions:
Stephan reaction
